How to setup application to automatically sound out via USB device

I am making max application to run automatically as the computer powers on.
I connected USB sound device for the sound output, not the audio jack on mac.
I used DSP Status to change the sound output destination in the patch.

How can I export to the application with set up the sound output via USB device automatically?

but could you describes me with a sample patch?
the patch help seems a bit confused for me, a newbie.
It will be great if the initial bang automatically changes the audio output to USB device from Built-In output with the message. Because I don’t see the list of output device in qmenu..